In real business cycle models, business cycles are caused by ______, while in new Keynesian model, business cycles are caused by ________

The trade-offs made by the U.S. government to fund the war in Iraq

A) exceed the benefits derived from the war. B) show that the government is justified in its war spending. C) prove that the government is spending too much on the war. D) represent what was potentially sacrificed to engage in the war.

Positive economics:

a. will usually tell us which policy is best. b. reveals "what ought to be" in economic matters. c. is of little use to policy makers. d. is the scientific study of "what is" among economic relationships.